Are you referring to the "type of signs" menu item? In general the drop down menus will drop upwards from the menu item if there isn't enough space below it. Since Silverlight is blocking the view of the drop down menus, I can't see exactly where it's dropping down now. If you wish however, you can specify a set height for a particular drop down menu and have it be scrollable. For example:
Code:
<div id="dropmenu1_b" class="dropmenudiv_b" style="height:300px;overflow-y:scroll">
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C1/">Horizontal CSS Menus</a>
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C2/">Vertical CSS Menus</a>
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C4/">Image CSS</a>
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C6/">Form CSS</a>
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C5/">DIVs and containers</a>
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C7/">Links and Buttons</a>
<a href="http://www.dynamicdrive.com/style/csslibrary/category/C8/">Other</a>
</div>
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